Shure BETA 98AMP Mode D'emploi page 4

Load Impedance
Maximum SPL capability, output clipping level, and dynamic range vary with the input
load impedance of the preamplifier to which you connect the microphone. Shure recom-
mends a minimum input load impedance of 1000 Ω. Most modern microphone preampli-
fiers meet this requirement. Higher impedance results in better performance for these
specifications.
Power Requirements
This microphone requires phantom power and performs best with a 48 Vdc supply (IEC-
61938). However, it will operate with slightly decreased headroom and sensitivity with
supplies as low as 11 Vdc.
Most modern mixers provide phantom power. You must use a balanced microphone
cable: XLR-to-XLR or XLR-to-TRS.
SPECIFICATIONS
Cartridge Type
Polar Pattern
Frequency Response
Output Impedance
Sensitivity
open circuit voltage, @ 1 kHz, typical
Maximum SPL
1 kHz at 1% THD
[2]
Signal-to-Noise Ratio
[3]
Dynamic Range
@ 1 kHz
Clipping Level
@ 1 kHz, 1% THD
Self Noise
equivalent SPL, A-weighted, typical
Common Mode Rejection
10 to 100,000 kHz
Polarity
Power Requirements
Net Weight
1 Pa=94 dB SPL
[1]
THD of microphone preamplifier when applied input signal level is equivalent to cartridge output
[2]
at specified SPL
S/N ratio is the difference between 94 dB SPL and equivalent SPL of self noise, A-weighted
[3]
All specifications measured with a 48 Vdc phantom power supply. The microphone operates at
[4]
lower voltages, but with slightly decreased headroom and sensitivity.
4 4 4 4 4 4 4 4 4
Electret Condenser
Cardioid
20 to 20,000 Hz
150 Ω
–50.5 dBV/Pa (2.5 mV)
[1]
2500 Ω load: 157.5 dB SPL
1000 Ω load: 153.0 dB SPL
63 dB
2500 Ω load: 126.5 dB
1000 Ω load: 122.0 dB
2500 Ω load: 12.5 dBV
1000 Ω load: 7.5 dBV
31.0 dB SPL-A
≥60 dB
Positive pressure on diaphragm produces positive
voltage on pin 2 with respect to pin 3
11–52 V DC phantom power (IEC-61938), 5.5 mA
[4]
130 g (4.6 oz.)
Accessories and Parts
Furnished Accessories
Universal Microphone Mount
A75M Small Mic Clip
Zippered Carrying Bag
Snap-fit Windscreen
Optional Accessories
Snap-Fit Windscreen (4 per package)
Mic Clip
Metal Locking Windscreen
7.6 m (25 ft.) Cable
A75M Large Mic Clip
A75M Universal Microphone Adapter
Replacement Parts
Cardioid Cartridge
CERTIFICATION
Eligible to bear CE Marking. Conforms to European EMC Directive 2004/108/EC. Meets
Harmonized Standards EN55103-1:1996 and EN55103-2:1996, for residential (E1) and
light industrial (E2) environments.
The Declaration of Conformity can be obtained from:
Authorized European representative:
Shure Europe GmbH
Headquarters Europe, Middle East & Africa
Department: EMEA Approval
Wannenacker Str. 28
D-74078 Heilbronn, Germany
Phone: +49 7131 72 14 0
Fax: +49 7131 72 14 14
Email: EMEAsupport@shure.de
Note:
Information in this guide is subject to change without notice. For the additional
information about this product, please visit www.shure.com.
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